'''
袁吉航
'''
class Animal:
    def _init_(self, species, sound):
       if species in {'猫', '狗', '羊', '猴子', '老虎', '大象'}:
           self.species = species
           self.sound = sound
       else:
           self.species = None
           self.sound = None
    def speak(self):
       if self.species == None:
           print('动物园里没有动物，游戏结束！')
           return False
       else:
           print(self.species, self.sound)
           return True
print('动物园里有什么？')
flag = True
while flag:
    s = input('请输入动物种类和叫声( ):')
    listl = s.split(' ')
    animal = Animal (list1[0], list1[1])
    flag = animal.speak()